Lennox International Inc 506510-01 Gauge SET, Servicing Units Delivered Void of Charge

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Servicing Units Delivered Void of Charge

If the outdoor unit is void of refrigerant, clean the system using the procedure described below.

1.Leak check system using procedure outlined on Page 16.

2.Evacuate the system using procedure outlined on Page 18.

3.Use nitrogen to break the vacuum and install a new filter drier in the system.

4.Evacuate the system again using procedure outlined on Page 18.

5.Weigh in refrigerant using procedure outlined in Figure 14.

6.Monitor the system to determine the amount of moisture remaining in the oil. It may be necessary to replace the filter drier several times to achieve the required dryness level. If system dryness is not verified, the compressor will fail in the future.

Unit Start−Up

IMPORTANT

If unit is equipped with a crankcase heater, it should be energized 24 hours before unit start−up to prevent compressor damage as a result of slugging.

1.Rotate fan to check for binding.

2.Inspect all factory− and field−installed wiring for loose connections.

3.After evacuation is complete, open both the liquid and vapor line service valves to release the refrigerant charge contained in outdoor unit into the system.

4.Replace the stem caps and tighten to the value listed in Table 1.

5.Check voltage supply at the disconnect switch. The voltage must be within the range listed on the unit’s nameplate. If not, do not start the equipment until you have consulted with the power company and the voltage condition has been corrected.

6.Set the thermostat for a cooling demand. Turn on power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit.

7.Recheck voltage while the unit is running. Power must be within range shown on the nameplate.

8.Check system for sufficient refrigerant by using the procedures listed under System Charge.

System Refrigerant

This section outlines procedures for:

1.Connecting gauge set for testing and charging;

2.Checking and adjusting indoor airflow;

3.Adding or removing refrigerant.

GAUGE SET

CONNECTIONS FOR TESTING AND CHARGING

MANIFOLD GAUGE SET

LOW HIGH

 

SUCTION LINE

 

B SERVICE PORT

 

 

CONNECTION

 

 

REFRIGERANT TANK

 

CHARGE IN

A

 

LIQUID PHASE

 

 

 

DIGITAL SCALE

D TEMPERATURE

C

SENSOR

 

 

 

 

 

TO LIQUID

 

 

LINE SERVICE

 

 

VALVE

OUTDOOR UNIT

VAPOR LINE

SERVICE VALVE

TEMPERATURE SENSOR

(LIQUID LINE)LIQUID LINE SERVICE VALVE

AClose manifold gauge set valves and connect the center hose to a cylinder of HFC−410A. Set for liquid phase charging.

BConnect the manifold gauge set’s low pressure side to the suction line service port.

CConnect the manifold gauge set’s high pressure side to the liquid line service port.

DPosition temperature sensor on liquid line near liquid line service port.

Figure 11. Gauge Set Setup and Connections

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506510−01

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Contents Shipping and Packing List Table of ContentsGeneral AIR ConditionerModel Number Identification Unit Dimensions − Inches mm and Parts ArrangementSide View Access View Base with Elongated LegsControl BOX PLUMBING, Switches and Sensor ComponentsTypical Unit Parts Arrangement Operating Service Valves Operating Gauge Set and Service ValvesUsing Manifold Gauge SET Torque RequirementsOperating Ball Type Service Valve To Access Service PortOperating Angle Type Service Valve Reinstall Stem CapRecovering Recovering Refrigerant from Existing SystemMinimum Clearance Between TWO Units New Outdoor Unit PlacementClearance on ALL Sides Minimum Clearance Above Unit Positioning ConsiderationsRoof Mounting Elevating the UnitStabilizing Unit on Uneven Surfaces Slab Mounting at Ground Level Outside Unit PlacementElevated Slab Mounting using Feet Extenders Stabilizing Unit on Uneven SurfacesAccess and Louvered Removing and Installing PanelsAccess Panel Removal Louvered Panel InstallationNew or Replacement Line Set Refrigerant Line SETLine SET Brazing Uncased Coil Shown FlushingFlushing the System Line SET and Indoor Coil 1Flushing Line SET and Indoor Coil 2 Sensing Bulb InstallationEqualizer Line Installation Leak Testing the System Installing Isolation GrommetsLeak Test Line SET and Indoor CoilEvacuating Evacuating the SystemElectrical Size Circuit and Install Disconnect2INSTALL Thermostat 24VAC Transformer3ROUTE Control Wires 4ROUTE High Voltage and Ground WiresTypical XC17 Wiring Main Control Jumpers and Terminals Main Control AGEMain Control Jumpers and Terminals FANField Control Wiring Flat metal jumperOn−board link Servicing Units Delivered Void of Charge Connections for Testing and ChargingGauge SET Unit Start−UpAction AirflowIndoor Coil Requirements WeighCharge METHOD? Determine by Calculating System Charge for Outdoor Unit Void of ChargeTest and Charge Method ApproachSubcooling Operating and Temperature Pressures HFC−410A Temperature Fahrenheit PsigSystem Operation Test Pins Function Ambient Sensor Temperature / Resistance Range High Discharge Sensor Temperature / Resistance Range Main Control LED Alert Codes Sensor Temperature / Resistance RangeResetting LED Alert Codes System LED Alert CodesAlert Status Compressor LED Alert Codes Detected in RUN High Pressure Switch Operation Low Pressure Switch Operation High Discharge Temperature Sensor Operation FAN Motor Control and Start UP MaintenanceVerifying Jumper Settings J2 Verifying LED Status CodesLED Codes and Sequence of Operations Fan Motor Board Unit LED CodesControl Panel Testing for External Power to Fan Control Fan Motor Test FAN Motor Surge Protection Fan Motor Surge Protection DeviceStart UP Checks XC17 Start−Up and Performance ChecklistCooling Mode Subcooling